Description

Verify that the "WordPress Importer" plugin is installed in the network, but disabled on this specific site.

Log in as a site administrator.

Click on "Tools" and "Import".

You'll see the message "No importers are available."

If, however, you open the same screen as a network admin, WordPress will show a link "Run importer". If you click it, WP will activate the "WordPress Importer" plugin and proceed with the import process.

This inconsistency is confusing to users. It does not really make sense because both site admins and network admins have the necessary capabilities to activate the importer plugin (provided that it is installed).